High count rate pseudo-random single photon counting system for time-resolved diffuse optical imaging

Qiang Zhang; Nanguang Chen

doi:10.1117/12.841924

23 February 2010 High count rate pseudo-random single photon counting system for time-resolved diffuse optical imaging

Qiang Zhang, Nanguang Chen

Proceedings Volume 7556, Design and Quality for Biomedical Technologies III; 755604 (2010) https://doi.org/10.1117/12.841924
Event: SPIE BiOS, 2010, San Francisco, California, United States

Abstract

Pseudo-random single photon counting (PRSPC) is a new time-resolved method combining the spread spectrum timeresolved optical measurement method with single photon counting. A continuous wave laser diode is modulated with a pseudo-random bit sequence, while a single photon detector is used to record the pulse sequence in response to the modulated excitation. Periodic cross-correlation is performed to retrieve the impulse response. Compared with conventional time-correlated single photon counting (TCSPC), PRSPC enjoys many advantages such as low cost and high count rate without compromising the sensitivity and time-resolution. In this paper, we report a PRSPC system that can be used for high speed acquisition of the temporal spread function of diffuse photons. It can reach a photon count rate as high as 3Mcps (counts per second). Experimental work has been conducted to demonstrate the system performance.

Citation Download Citation

Qiang Zhang and Nanguang Chen "High count rate pseudo-random single photon counting system for time-resolved diffuse optical imaging", Proc. SPIE 7556, Design and Quality for Biomedical Technologies III, 755604 (23 February 2010); https://doi.org/10.1117/12.841924

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